Aquatic Bond Adaption

When you assume the form of an aquatic animal, your companion can take to the water by your side.Prerequisite: Bonded companion class feature, such as an animal companion, familiar, or mount.Benefit: When you are the subject of a polymorph effect—including spells of the polymorph subschool and the druid’s wild shape ability—and you assume the shape of an aquatic creature, your bonded companion can also assume the shape of an aquatic creature. Your bonded companion’s shape must be chosen from the list of bonded companions available in an aquatic campaign, as appropriate for your type of bond. For example, a druid’s animal companion could take the shape of a dolphin, or a witch’s familiar could take the shape of a snapping turtle. This adaptation functions as though you had targeted your bonded companion with the same polymorph effect you yourself are using, even if a creature of your bonded companion’s type is normally not affected by the effect or the effect can normally only target yourself.
Your bonded companion assumes the shape of an aquatic or amphibious creature as part of the same action that created the polymorph effect, and remains in that shape as long as you remain polymorphed. You can choose not to have your animal companion change shape with you.